Mouthpiece



FIG. 1 is a top perspective view of a mouthpiece showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross sectional view taken along line 8-8 in FIG. 4. 

CLAIM The ornamental design for a mouthpiece, as shown and described. 